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sin ^(6) theta+cos ^(6) theta+3 sin ^(2)...

`sin ^(6) theta+cos ^(6) theta+3 sin ^(2) theta . cos ^(2) theta=`

A

0

B

1

C

2

D

3

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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  4. If 1+sin x+sin ^(2) x+….. to infty=4+2root 3 , 0 lt x lt pi then x=

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  5. If for real values of x, cos theta=x+(1)/(x), then

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  6. If sin theta(1)+sin theta(2)+sin theta(3)=3 then cos theta(1)+cos thet...

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  7. If sec x=P and cosec x=Q then

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  8. If tan theta+sec theta=sqrt(3), 0 lt theta lt pi then theta=

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  9. log tan 1^(circ)+log tan 2^(circ)+... .+log tan 89^(circ)=

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  10. The value of e^(log(10) tan 1^(o) +…. + log(10) tan 89^(o) is

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  11. cos ^(2) 5^(circ)+cos ^(2) 10^(circ)+cos ^(2) 15^(circ)+….+cos ^(2) 90...

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  12. The value of cot 5^(circ) . cot 10^(circ) .. . cot 85^(circ) is

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  13. cot 7 (1)/(2)^(circ)=

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  14. If x . tan 45^(circ) . cos 60^(circ)=sin 60^(circ) cot 60^(circ), then...

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  15. (sin 70^(@) + cos 40^(@))/(cos 70^(@) + sin 40^(@)) =

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  16. sin 47^(circ)+sin 61^(circ)-sin 11^(circ)-sin 25^(circ)=

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  17. sqrt(3) cot 20^(circ)-4 cos 20^(circ)=

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  18. For A=133^(circ), 2 cos (A/2)=

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  19. If 0^(circ) lt theta lt 180^(circ) then sqrt(2+sqrt(2+sqrt(...+sqrt(2(...

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  20. cos ^(2) 73^(circ)+cos ^(2) 47^(circ)+cos 73^(circ) . cos 47^(circ)=

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